Georgia Tech Research Corporation

Speedlink Technology Inc.

Swiftlink Technologies Inc.

Hua Wang

Thomas C Chen

Taiyun Chi

Min-Yu Huang

Fei Wang

Huy Thong Nguyen

Song Hu

Dongxu Chen

Jongseok Park

Edgar Felipe Garay

Doohwan Jung

Justin Romberg

Thomas Chen

Sensen Li

Shaojie Xu

Andrew Hessel

An embodiment of the present disclosure relates to a method of controlling a power amplifier (PA). The PA can comprise a main PA path and an auxiliary PA path. The auxiliary PA path can have a plurality of turn-on settings. The method can comprise: determining a power back off gain and a lower bound gain for the PA; and performing an iterative auxiliary PA turn-on setting selection process. The selection process can comprise: determining an instantaneous power input to the PA; based on the instantaneous power input, choosing a turn-on setting in the plurality of turn-on settings of the auxiliary PA path that causes an instantaneous gain of the PA to be between the power back off gain and the lower bound gain; and applying the chosen turn-on setting to the auxiliary PA path.

Power amplifiers and methods of controlling same

According to one embodiment, a compact broadband radio frequency (RF) frontend circuit includes a number of single-channel transceivers, a number of analog to digital converters (ADCs), where each of the ADCs is coupled to one of the single-channel transceivers, a number of digital to analog converters (DACs), where each of the DACs is coupled to one of the single-channel transceivers, and a digital signal processing (DSP) unit coupled to the ADCs and the DACs. The DSP unit is configured to generate a first set of digital data streams simultaneously and each of the first set of digital data streams is converted by a respective one of the DACs into an analog data stream to be transmitted to a remote device by a respective one of the single-channel transceiver.

MIMO transceiver array for multi-band millimeter-wave 5G communication

A method of synthesis of a nucleotide chain, the nucleotide chain including an ordered plurality of nucleotides, the method including: identifying a first nucleotide of the ordered plurality of nucleotides; controlling a polymerase enzyme to assemble the first nucleotide onto the nucleotide chain by electrically modulating an electrode; identifying a subsequent nucleotide in the ordered plurality of nucleotides as a current nucleotide; and controlling the polymerase enzyme to assemble the current nucleotide onto an end of the nucleotide chain by electrically modulating the electrode.

Devices, systems, and methods of electronic modulation of polymerase for DNA synthesis

A dual-drive power amplifier (PA) where the PA core includes a differential pair of transistors Mand Mthat are driven by a coupling network having two transmission-line couplers, where a first transmission line section of a coupler is configured to transmit an input signal Vin through to drive a gate of the opposite transistor, while the second transmission line section is grounded at one end and coupled with the first transmission line section such that a coupled portion αVin of the input signal Vin drives the source terminal of a corresponding transistor. The arrangement of the coupling network allows the source terminals to be driven below ground potential. Embodiments disclosed here further provide an input matching network, a driver, an inter-stage matching network, and an output network for practical implementation of the PA core.

Highly efficient dual-drive power amplifier for high reliability applications

The disclosed technology includes device, systems, techniques, and methods for amplifying a complex modulated signal with a broadband power amplifier. A broadband power amplifier may include an input network connected a long an input signal path, a driver stage, an interstage matching network stage, a power amplification stage, and a broadband matching output network. The broadband matching output network may include two coupled transmission lines and a compensation line connected between the two coupled transmission lines. Further, the broadband matching output network may include a capacitor connected with a secondary winding and a capacitor connected to each of the primary windings. The disclosed technology further includes transmission systems incorporating the broadband power amplifier.

Power amplifiers and transmission systems and methods of broadband and efficient operations

A dual-drive power amplifier (PA) where the PA core includes a differential pair of transistors Mand Mthat are driven by a coupling network having two transmission-line couplers, where a first transmission line section of a coupler is configured to transmit an input signal Vin through to drive a gate of the opposite transistor, while the second transmission line section is grounded at one end and coupled with the first transmission line section such that a coupled portion &#x3b1;Vin of the input signal Vin drives the source terminal of a corresponding transistor. The arrangement of the coupling network allows the source terminals to be driven below ground potential. Embodiments disclosed here further provide an input matching network, a driver, an inter-stage matching network, and an output network for practical implementation of the PA core.

Reconfigurable antennas are provided. A reconfigurable antenna includes a plurality of antenna radiators and a plurality of feeds that are electrically or electromagnetically coupled to the plurality of antenna radiators. The plurality of feeds control current or voltage of the plurality of antenna radiators. Related methods of operating a reconfigurable antenna are also provided.

Reconfigurable antennas and methods of operating the same

According to one embodiment, a compact broadband radio frequency (RF) receiver circuit includes a low noise amplifier which includes a first amplifier stage, a second amplifier stage, an inter-stage network including a higher order filter network, where the inter-stage network is coupled between the first amplifier stage and the second amplifier stage, and a double resonance transformer network coupled to an output of the second amplifier stage. The RF receiver circuit includes a low pass filter and a mixer circuit coupled between the low noise amplifier and the low pass filter.

Compact broadband receiver for multi-band millimeter-wave 5G communication

According to one embodiment, a matching network circuit includes a first capacitor coupled, in parallel, to an input port of the matching network circuit; a broadband on-chip transformer coupled, in parallel, to the first capacitor, where the broadband on-chip transformer includes a primary winding and a secondary winding, where the secondary winding is a partial winding. The matching network circuit includes a second capacitor coupled, in series, in between the broadband on-chip transformer and an output port of the matching network circuit.

Broadband power amplifier and matching network for multi-band millimeter-wave 5G communication

According to one embodiment, an antenna includes multiple high-band (HB) radiation elements and a low-band (LB) radiation element. Each HB radiation element is configured to resonate or excite within a first frequency band to transmit and/or receive RF signals associated with the first frequency band. The LB band radiation element is configured to resonate or excite within a second frequency band to transmit and/or receive RF signals associated with the second frequency band. The HB radiation elements are arranged such that the distance between any two of the HB radiation elements is at least a half of a wavelength associated with the first frequency band. The LB radiation element is surrounded by the HB radiation element, for example, in a symmetrical manner.

Scalable radio frequency antenna array structures

According to one embodiment, a low noise amplifier (LNA) circuit includes a first stage which includes: a first transistor; a second transistor coupled to the first transistor; a first inductor coupled in between an input port and a gate of the first transistor; and a second inductor coupled to a source of the first transistor, where the first inductor and the second inductor resonates with a gate capacitance of the first transistor for a dual-resonance. The LNA circuit includes a second stage including a third transistor; a fourth transistor coupled between the third transistor and an output port; and a passive network coupled to a gate of the third transistor. The LNA circuit includes a capacitor coupled in between the first and the second stages, where the capacitor transforms an impedance of the passive network to an optimal load for the first amplifier stage.

Wideband low noise amplifier (LNA) with a reconfigurable bandwidth for millimeter-wave 5G communication

According to one embodiment, a dual voltage controlled oscillator (VCO) circuit includes a first VCO and a second VCO. The first VCO includes: a first variable capacitor having an input node, a first output node, and a second output node, a second variable capacitor coupled in parallel with the first variable capacitor, a first transistor, and a second transistor, where the first transistor has a first drain coupled to the first output node, a first gate coupled to the second output node, and a first source coupled to a ground, where the second transistor has a second drain coupled to the second output node and a second gate coupled to the first output node, and a second source coupled to the ground. The dual VCO circuit includes a second VCO mirroring the first VCO, a first and a second inductors coupled to the first and the second VCO respectively.

Dual voltage controlled oscillator circuits for a broadband phase locked loop for multi-band millimeter-wave 5G communication

The disclosed technology includes device, systems, techniques, and methods for amplifying a complex modulated signal with a mixed-signal power amplifier. A mixed-signal power amplifier may include an input network for splitting an input signal to multiple signals with corresponding phase and amplitude offsets, a main power amplification path including at least an analog power amplifier for amplifying a first signal, one or more auxiliary power amplification paths including at least one digitally controlled analog power amplifier in each path for amplifying a second signal, and an output network for combining the two amplified signals. The main power amplification path and the auxiliary power amplification paths can operate together to achieve load modulation to enhance the overall power amplifier efficiency at power back-off mode and the overall power amplifier linearity. The disclosed technology further includes transmission systems incorporating the mixed-signal power amplifier.

Mixed-signal power amplifier and transmission systems and methods

A packaged integrated circuit device includes a transceiver with one or more oscillators therein. The oscillators can be configured as harmonic or fundamental-frequency oscillators for signal transmitting, or they can be configured as regenerative receivers for signal receiving. An antenna is provided in the package and, preferably, on the same chip IC chip as the transceiver. The antenna includes one or more feeds, which are coupled to the one or more oscillators. A dual-function varactor/envelope detector is provided, which is electrically coupled to the one or more oscillators. A control circuit is provided, which is configured to drive nodes of the transceiver and the dual-function varactor/envelope detector with a first plurality of reference voltages during operation of the transceiver as a radio transmitter (with varactor) and a second plurality of reference voltages during operation of the transceiver as a radio receiver (with envelope detector).

Bidirectional oscillator-based radio with integrated antenna

According to one embodiment, a transmit/receive (T/R) switch includes a transmit switch, between a transmit port and an antenna port, a receive switch, between a receive port and the antenna port, a transmit inductor, coupled in parallel between the transmit switch the transmit port, and a receive inductor, coupled in parallel between the transmit switch the transmit port. The T/R switch can be co-designed with a power amplifier (PA) output matching circuit.

Growing community of inventors

Atlanta, GA, United States of America

Hua Wang